Improvement in anchors



te. t aw J. DURELL GREENE, OF CAMBRIDGE, ASSIGNOR TO HIMSELF AND CHARLES vI-l. P. PLYMPTON, OF BOSTON, MASSACHUSETTS.

Letters .Patent No. 88,7 81, dated April 13, 1869.

The Schedule referred to in these .LettersPatenh and making part; `of the same.

To all whom it may concern:

Be it known that I, J. DURELL GREENE., of 0ambridge, in the county of Middlesex, and State of Massachusetts, have invented an Improved Anchor; and I do hereby declare that the following, taken'in connection with the drawings, which accompany and form part" of this specification, is a description of my invention, suiiicient to enable those skilled in the art to l practise it.

This inventionrelatesto peculiarities in anchors usingno stock, and in which two dukes, or arms are kpiv'oted to the anchor-shank, so that, in taking ground,

both linkes will form equal angles with the shank, and ou the same side thereof, the dukes turning to either l side of the shank as the anchor touches the ground.

My invention may be said to consist in an anchor made with the palms of its dukes. in the same plane, and with the arms of its dukes made integral with an open yoke, across which extends, from one side to the other, in the same plane with the palms and arms of the dukes, a pin, shaft, or pivot, integral with the yoke, the A'shank being entered within the yoke-opening, and grasping' the cross-shaft in thev yoke, in the manner of a machine-bearing, .allof which will be fully understood from inspection of the drawings, in which-- Figure 1 isa side elevation of an anchor made in accordance with my invention, about asit appears when it has f taken hold.

Figure 2 being a sectional view of the same, but with the shank horizontal.

Figure 3 being a plan of my anchor has it appears When-resting on deck.

ais the shank, which is without a stock, as none is needed in my anchor, the shank being provided with a cable-ring, b. j

There are two dukes, each madeup of a palm, c, and arm c1, located in the same plane, the arms being made integral with a central piece, e, which, being made open, and joining the arms together, and fitting over the shank, which is thrust through the opening in e, I call a yoke.

Across this opening, and in the Asame plane with the arms d, is a cylindrical pin, f, integral 'with the yoke.

The end of the shank making the crown of the anchor is slotted through, leaving, at the bottom of the slot, one-half of a cylindrical bearing, of a diameter suited to the pin f, and between the jaws g, formed` on ea'ch side of the slot through the shank, is fitted a cap.- piece, 71, which has a semi-cylindrical cavity at its inner end, whichiits upon the pin f, and completes the bearing by which the dukes are held to the shank, and

ment of a buoy-rope, when necessary, and also for attaching the `fish-tackle.

The pin f is preferably dtted somewhat loosely in its bearing, and receives none of the pull of the vessel upon the anchor, this pulling-strain being taken by the yoke and the shank at their points of contact, denoted by x :v in dg'. 2. When' the anchor falls on the ground llatwise, as in dg. 3, it is clear that any pull on the cable will cause the shank to assume the angle, with relation to the dukes, seen in iig. 1, the limit of the angle being'determinc'd by the relation of the points of contact x x. l

' Of course it will be obvious, that when-the anchor assumes such a position, any obstruction to the drag of the anchor-bills le will cause them to catch, and the palms and dukes will plow into and will bury themselves in the ground.

If the anchor, in falling, strikes upon the edge, l, of either palm, it will tip over, so that the palms will form an angle of about forty-five degrees withthe ground, this bringing the crown of the yoke into contact with the ground at one of the points z z, and then any drag upon the anchor will bring both bills to the ground, so that, when they meet with resistance, they and the dukes will bury, and the shank will take the angle seen vin dg. l.

When dismembered by ,removal of cap, h, the parts of the anchor stow closely, and, spare parts being carried, breakages may be easily repaired, or when two or more anchors of the same size are carried, the broken portion of one may be replaced by a whole part from another.

The hole j, besidesA serving for the purposes named before, is intended to receive a tripping-line, the purposes and operation of which are too well known to seamen to need explanation here.

I claim the anchor, substantially as made, with the palms and arms of the -dukes in the same plane, united by the yoke, as shown, with the shank extending through the yoke, and pivoted thereunto, as set forth.

J. DURELL GREENE. Witnesses:

J. B.,0nos1ar 0. WARREN BROWN. 

